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Apparatus and method for limiting leakage current

A technology of electrical equipment and leakage current, applied in the field of equipment and methods for limiting leakage current, capable of solving problems such as additional cost and increase in equipment volume, and achieving the effect of preventing work

Active Publication Date: 2016-10-05
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This solution therefore has the disadvantage of causing additional costs and increased equipment volume, which greatly disadvantages electric vehicles

Method used

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  • Apparatus and method for limiting leakage current
  • Apparatus and method for limiting leakage current
  • Apparatus and method for limiting leakage current

Examples

Experimental program
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Embodiment Construction

[0030] figure 1 Shows the principle behind the creation of leakage currents called "touch" currents in an electric vehicle connected to a battery charger that is not electrically isolated

[0031] However, it will be pointed out that this principle is applicable to any type of equipment, any type of battery charger or otherwise, in particular for motor vehicles with electric or hybrid drive systems in which contact currents may Occurs when the device touches the body of the vehicle after it is connected.

[0032] In this figure, reference numeral 1 designates the vehicle as a whole and reference numeral 2 designates an electrically conductive structure of the vehicle, in this example the body of the vehicle.

[0033] As shown, the electric vehicle 1 is equipped in this example with a charger 3 and also includes a battery assembly and an uninsulated electric drivetrain assembly.

[0034] Naturally, the vehicle 1 can also be equipped with many further components, which are not...

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PUM

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Abstract

The present invention relates to devices and methods for limiting leakage currents. The device comprises: means for detecting the position of a neutral wire of a power supply for an electrical energy device (3), and for connecting between the neutral wire and a conductive structure (2) in which the electrical energy device (3) is placed for limiting An arrangement (1I, I1, I2, I3) of leakage current capacitors (9a, 9b, 9c, 10), the electrical energy device (3) is eg a battery charger for an electric vehicle or a hybrid vehicle. The invention may be used to limit leakage currents during recharging of electric traction or hybrid traction motor vehicles.

Description

technical field [0001] The present invention relates to the limitation of leakage currents of electrical equipment, and more particularly, the limitation of leakage currents that may occur within the chassis of an electric or hybrid motor vehicle when connected to a battery charger. Background technique [0002] The chargers used in some electric vehicles are not insulated. Each component in the charger has a common-mode capacitor with respect to the chassis. When connected to the distribution network, voltages applied to these various components will cause leakage currents to ground through these capacitors. [0003] These leakage currents to ground, when they occur, can lead to differential protection against residual currents, which can interrupt the charging process. [0004] If a user touches the chassis of an electric vehicle during charging, if the vehicle has a ground fault, the leakage current flowing to ground becomes a current called a "touch" current. These to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00B60L3/00
CPCB60L3/0069H02J7/0034H02H3/167
Inventor C·里波尔F·弗路克萨
Owner RENAULT SA